Great question, what i think would be a great way to tackle this is to check the working principle of the groupbox and see if we can alter the working principle to move to the side.
What i think will happen is that you need to create a new widget for the groupbox or alter the state of the collapsed widget.
In your sass folders you will have to search for the .collapsed class, this currently just shows “display:none” but combining it with the groupbox classes you might be able to alter the width and height of the header and play around with how it shows in the UI.